Microplastics distribution in river side bars: The combined effects of water level and wind intensity.

Autor: Garello NA; The National Institute of Limnology (INALI; CONICET-UNL), Ciudad Universitaria (3000), Santa Fe, Argentina. Electronic address: nicolas.garello@conicet.gov.ar., Blettler MCM; The National Institute of Limnology (INALI; CONICET-UNL), Ciudad Universitaria (3000), Santa Fe, Argentina. Electronic address: mblettler@inali.unl.edu.ar., Espínola LA; The National Institute of Limnology (INALI; CONICET-UNL), Ciudad Universitaria (3000), Santa Fe, Argentina. Electronic address: luis.e@conicet.gov.ar., Rodrigues S; CNRS UMR 7324 CITERES and Graduate School of Engineering Polytech Tours, University of Tours, France. Electronic address: srodrigues@univ-tours.fr., Rimondino GN; Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA, Córdoba, Argentina. Electronic address: grimondino@unc.edu.ar., Wantzen KM; CNRS UMR 7324 CITERES and Graduate School of Engineering Polytech Tours, University of Tours, France; UNESCO Chair River Culture, CNRS UMR 7324 CITERES, University of Tours, CNRS UMR 7362 LIVE, Strasbourg University, France. Electronic address: karl.wantzen@univ-tours.fr., Rabuffetti AP; The National Institute of Limnology (INALI; CONICET-UNL), Ciudad Universitaria (3000), Santa Fe, Argentina., Girard P; Departamento de Botânica e Ecologia, Universidade Federal de Mato Grosso, Cuiabá, MT 78060-900, Brazil; Centro de Pesquisa do Pantanal, Cuiabá, MT 78.068-360, Brazil., Malanca FE; Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria X5000HUA, Córdoba, Argentina. Electronic address: fabio.malanca@unc.edu.ar.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Nov 01; Vol. 897, pp. 165406. Date of Electronic Publication: 2023 Jul 08.
DOI: 10.1016/j.scitotenv.2023.165406
Abstrakt: Rivers are the main pathway for microplastics (MP) transport toward the ocean. However, the understanding of the processes involved in the deposition and mobilization of MP in rivers, specifically in sediment side bars (SB), remains very limited. The objectives of this study were: (i) to examine the effect of hydrometric fluctuations and wind intensity on the distribution of microplastics (MP < 5 mm) in the SB of large river (the Paraná River), (ii) to determine the characteristics of MP to infer their origin and fate, and (iii) to discuss potential similarities or differences between MP suspended in the water column and MP found in sediment. The SB and water column were sampled during the autumn, winter, and spring of 2018, and the summer of 2019 at different river discharges and wind intensities. >90 % of the MP items found were fiber of polyethylene terephthalate (PET; FT-IR analysis), the most common MP color was blue, and most were in the 0.5-2 mm size range. The concentration/composition of MP varied according to the river discharge and wind intensity. During the falling limb of the hydrograph when discharge is decreasing and sediments are exposed for short periods (13-30 days), MP particles transported by the flow were deposited on temporarily exposed SB, accumulating there in high densities (309-373 items/kg). However, during the drought, when sediments remained exposed for a long time (259 days), MP were mobilized and transported by the wind. During this period (no influence of the flow), MP densities significantly decreased on SB (39-47 items/kg). In conclusion, both hydrological fluctuations and wind intensity played a significant role in MP distribution in SB.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: